SB20260812350 - NULL pointer dereference in Linux kernel mt76 mt7925 driver
Published: August 12, 2026
Security Bulletin ID
SB20260812350
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) NULL pointer dereference (CVE-ID: CVE-2026-68193)
CWE-ID: CWE-476 - NULL Pointer Dereference
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local attacker to cause a denial of service.
The vulnerability exists due to a NULL pointer dereference in mt7925_rx_check() and mt7925_queue_rx_skb() when handling PKT_TYPE_TXRX_NOTIFY on non-mmio buses. A local attacker can trigger the affected code path to cause a denial of service.
The issue occurs on USB devices because the tx_cleanup callback is NULL for non-mmio queue operations.
Remediation
Install update from vendor's website.